This is the third question's answer

This practice is similar to the third question

↓This is fourth question↓
you can send for us your answers until 27 December

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Send your solution to @mathcenter

the names of who have solved the fourth question:
Easy:
Ahmed Al-Aradi from bahrain
Hassan H.Rostami from Iran
Anwar Alkamali from yemen
Waheed alsalehi from yemen
Medium:
Hassan H.Rostami from Iran
Anwar Alkamali from yemen
Hard:
Anwar Alkamali from yemen

@worldmath

This is the fourth question's answer(easy and medium)

This is the fourth question's answer(hard)

This practice is similar to the fourth question

↓This is fifth question↓
you can send for us your answers until 3 January

@worldmath

Send your solution to @mathcenter

This is the fifth question's answer(easy and medium)

This is the fifth question's answer(medium)

This practice is similar to the fifth question

↓This is sixth question↓
you can send for us your answers until 10 January

@worldmath

Send your solution to @mathcenter

the names of who have solved the fifth question:
Easy:
Ahmed Al-Aradi from bahrain
Tariq Althwamy from yemen
Anees al-maqtri from yemen
Anwar Alkamali from yemen
Matteo from italy
Medium:
Anwar Alkamali from yemen
Medium:
Anwar Alkamali from yemen
Tariq Althwamy from
yemen
2016!:
Anwar Alkamali from yemen

@worldmath